On the day immediately preceding today. Also: on the day before.

Of a recurring division of time. Of a division of a day, in singular: of or belonging to yesterday, as last evening, †last morning, last night, etc.

Scottish. Of time. Last past, ‘last’; as in this hinder day yesterday, this hinder night last night, yesternight.

On or during the night of yesterday; last night.

Yesterday. Now rare (in later use chiefly colloquial).

Yesterday. Obsolete.